Teamstack vs. ZITADEL Comparison Chart

FusionAuth is a modern, developer-focused identity and access management platform built to give you full control over your authentication stack. Whether you’re building a startup app or managing enterprise-scale infrastructure, FusionAuth delivers all the must-have features — from login and SSO to advanced protocols like OAuth2, OIDC, SAML, and WebAuthn — in a self-hostable or cloud-native package. Designed with developers in mind, FusionAuth integrates seamlessly with any language, framework, or architecture. Every capability is API-first and built for extensibility, so you can tailor authentication workflows without getting locked into rigid, inflexible systems. FusionAuth supports all the key use cases — user registration, multi-factor authentication (MFA), passwordless login, role-based access control, and more — while helping you stay compliant with GDPR, HIPAA, PCI, and other regulatory standards.

Auth0 takes a modern approach to Identity, providing secure access to any application, for any user. Safeguarding billions of login transactions each month, Auth0 delivers convenience, privacy, and security so customers can focus on innovation. Auth0 is part of Okta, The World’s Identity Company™. Auth0 lets you quickly integrate authentication and authorization for web, mobile, and legacy applications, with new Fine Grained Authorization (FGA) that goes beyond role-based access control. Authenticate users across all applications with a customized, secure, and standards-based single login. Universal Login connects users to a central authorization server. Credentials aren’t transferred across sources, which boosts security and protects against phishing and credential stuffing attacks. OAuth 2.0 recommends that only external user agents (like the browser) be used by native applications for authentication flows. Auth0’s Universal Login achieves this while enabling SSO.

Frontegg is a Customer Identity and Access Management (CIAM) platform that simplifies authentication, authorization, and user management for SaaS companies. It enables developers to implement advanced identity features quickly, then shift ongoing administration to other teams. With Frontegg, Product, Infosec, and Customer Success teams can take control of key identity tasks like managing user roles, enforcing security policies, and handling customer requests, all without engineering support. Developers reduce toil and regain focus on core product work, while stakeholders move faster without bottlenecks. Frontegg supports modern identity features including SSO, MFA, role-based access control, entitlements, multi-tenancy, and audit logs. Its low-code platform integrates in days and provides a user-friendly admin portal that bridges technical and non-technical teams. Frontegg increases operational efficiency, improves security posture, and enhances the customer experience.

1Password is a secure, scalable, and easy-to-use password manager that's trusted by the world's leading companies. Using 1Password makes it easy for your employees to stay safe online. Once 1Password is part of their workflow, good security habits will become second nature. 1Password Advanced Protection is now available with 1Password Business. Set Master Password policies, enforce two-factor authentication team-wide, restrict access with firewall rules, review sign-in attempts and require your team to use the latest version of 1Password. Our award-winning apps are available for Mac, iOS, Linux, Windows, and Android. 1Password syncs seamlessly across devices, so your employees always have access to their passwords. When everyone uses 1Password, your risk goes down — and your productivity goes up.

Josys is a modern AI-native identity security and governance platform. Enterprise AI adoption has made identity the fastest-growing attack surface, and the hardest to govern. Josys discovers, governs, and secures every identity — human, machine, and AI agent — across every application in the enterprise, allowing security and IT teams to surface risks, control access, and remediate identity threats in real-time.  Trusted by over 1,000 organizations and MSPs worldwide, Josys turns identity from the fastest-growing attack surface into an autonomously governed advantage. For more information, visit josys.com.

Uniqkey: Protect every login. Access with confidence. Uniqkey is Europe’s trusted password and access management platform - purpose-built for companies that demand security, simplicity, and control. Engineered by European cybersecurity experts, our platform combines military-grade encryption with an effortless user experience. We remove complexity from everyday workflows, helping employees stay secure without slowing them down. From auto-filling 2FA codes to streamlining access across your cloud environment, Uniqkey keeps security frictionless and productivity high. With real-time visibility across your entire infrastructure, IT teams gain complete control over access rights, employee activity, and security scores - empowering them to defend against threats and drive compliance with confidence proactively. Seamlessly integrated with Microsoft and other core systems, Uniqkey makes provisioning and offboarding fast, automated, and secure.

Securden Unified PAM is a privileged access security solution that lets you discover, centrally store, organize, share, manage, and keep track of all privileged identities, passwords, keys, documents, and other identities. It helps you establish a centralized password management system, automate management with approval workflows, control ‘who’ can access ‘what’, monitor, and record all access to critical IT assets, and enforce password security best practices. The major modules of Securden Unified PAM are password management, privileged account management, secure remote access, application control, endpoint privilege management, privileged session management, and SSH key management. The platform supports compliance with NIS2, DORA, NIST, PCI-DSS, HIPAA, and ISO-IEC 27001. Installation typically takes only a few minutes, and a complete production-ready PAM can be achieved in less than a month with Securden Unified PAM.

ADSelfService Plus is an on-premises access management solution that caters to businesses across various industries, such as IT, banking, engineering, education, aviation, and telecommunications. Key features include: 1. Self-service password resets and account unlocks: Users can reset their passwords in AD and unlock their domain accounts from a web browser. 2. MFA: Machine logins, VPN and OWA logins, and cloud app logins can be secured using MFA. 3. Password synchronizer and SSO: Users can log in to multiple apps using one unified identity via SSO and real-time password synchronization. 4. Password policy enforcer: Admins can configure custom password policies to enforce strong password creation. 5. Password expiration notifier: Admins can send end users password expiration notifications via SMS or email. 6. Directory self-update: Users can update their AD attribute information through the directory self-update feature.

10Duke Enterprise is a cloud-based, scalable and flexible software licensing solution enabling software vendors to easily configure, manage and monetize the licenses they provide to their customers in real-time. 10Duke enables you to gain a single point of license control for desktop, SaaS, and mobile apps, APIs, VMs and devices. It’s cloud-native, supports all license models, integrates with CRM & Ecommerce, has a built-in Customer Identity Management solution, and supports offline scenarios. 10Duke Enterprise is used by SMBs and Fortune 500 customers alike, and is SOC2 compliant. 10Duke Enterprise is used across a wide range of industries by the fastest-growing software vendors that offer desktop, SaaS and mobile apps, devices, APIs and VMs. It's specifically designed for fast-growing software businesses looking to scale up licensing & minimize friction. 10Duke Enterprise is used around the world by leading brands including Trimble, Causeway, Seequent, Maxon and Steinberg

Iris delivers flexible, integration-ready identity protection solutions that enable businesses to embed powerful security features directly into their existing digital experiences — without the cost or complexity of building from scratch. Whether you want full control or a pre-built experience, Iris offers two seamless approaches: Identity Protection API A developer-first solution that delivers Iris solutions (dark web monitoring, credit services, & much more) directly into your platform. Ideal for teams that want to fully customize the user experience while leveraging powerful protection behind the scenes. Micro-Experiences Customizable, embeddable components (“drop-in” modules) that can be added to your app or website. Perfect for quickly launching high-impact protection features with minimal development lift. Iris helps you turn identity protection into a seamless, value-added feature of your platform, driving engagement, trust, and long-term customer loyalty.